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If you’re forgot with your Nokia 1100 security code, there are several way you can use to unlock. You can even use this methods in many types of Nokia cell phones

Unlock using this master code : 6150662117

First Trick :
For Master code calculation visit Nokia Lock Code and enter it to unlock. For IMEI *#06#

Second Trick :

• press “unlock” button
• then press “back”
• then deep press unlock and then suddenly press *
• that’s all you unlocked the phone successfully.

NOTE:

it will not work on all nokia phones so please check the nokia phones before practising the trick;but the trick can effectively work on most non java enabled nokia phones

Third Trick :
Remove Your Sim Card, Power The Phone On
Press # From The (Insert Sim) Screen
Enter codes WITHOUT spaces.
Press * 3 times fast for (p)
Press * 4 times fast for (w)
Press * 2 times fast for (+)
Verify code before pressing the last #

Fourth One:
The only way you can reset the security code is to take it to Nokia or some mobile store where they will reset it using a flash cable.